Fiber-optic equalizer

Details Fiber-optic equalizer Fiber-optic equalizer

1990-08-01

1991-10-08

Sikes, William L.

Optical waveguides

With optical coupler

Particular coupling function

359127, G02B 626, G02B 642

Patent

active

050548751

ABSTRACT:
A multi-mode optical fiber segment having partially reflecting mirrors on each end functions as a resonant cavity with respect to the modulation frequency when the length of the fiber is equal to one-half the modulation wavelength of the light injected into the fiber. Modulated light is injected through a hole in the mirror at one end, either from a fiber, a waveguide, or directly from a laser diode. The core diameter of the cavity fiber is limited only by the requirement that it must be much larger than the input hole. Light exits though a hole in the mirror opposite the input hole. Upon entry into the resonant cavity, light is subject to multi-modal propagation resulting in dispersion. The resultant output light of the fiber is lower overall in intensity, but its useful frequency response is expanded by the bandpass half-skirt of the fiber-optic filter.

REFERENCES:
patent: 4577924 (1986-03-01), Mathis
patent: 4900116 (1990-02-01), Mathis
patent: 4910539 (1990-03-01), Mathis et al.

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